William h



@attriti 5mm Mie WILLIAM H. SIBLE, O-F HARRISBIIRG, PENNSYLVANIA.

Leners Pawn: No. 37,715', dazed Mme 9, 1869.

INIPROVEIMENT IN BIT-STOGK.

Ths Schedule referred to in these Letters Patent and making part of thesame.

To all whom tt lmix/y concern Be it known that I, W1LLIAM H. SIBLn, ofHarrs-V burg, in the county of Dauphin, and State of Pennsylvania, haveinvented a new and valuable Improvement in Devices for Holding Bits andother tools, or like purposes; and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the annexed drawings,making a part of this specification, and to the lettersand figures ofreference` marked thereon.

Figure 1 of the drawings is a perspective view of my l' device.

. Iligure2 is'a longitudinalsection ofthe same.

Figure 3 is an end View of the' stock, or handle, showing the positionand form of the vgripe E.

My invention relates to handles for holding bits and other tools; and nIt consists in thecombination of a coiled spring, ad. justed in thehandleA itself, with a hinged clamp, so

` arranged that the clamp shall be pressed against the i withinstoek.`A, as shown in iig. 2 of the drawings.

Letter I represents a slot in gripe E, for the recep tion of the shankO.

Letter i represents a finger, a projection of gripe E.

My device is operated as follows:

When the operator desires to insert the shank C of any tool into thetool-holder, he grasps the stock A with his left hand, and with'thethumb ofAthe same hand presses upon finger i. until the gripe E isforced to a horizontal position Within the upper rim of the stock, whichoperation causes the under surface of the gripe to press upon the metalcoil-spring e, forcing it downward. He then, withhis right hand, insertsthe shank of the tool he' desires to use into slot I, and then removeshis thumb from iinger'i, which operation relieves the spring e, andallows it to press upward Yagainst the gripe, thereby clamping the shankof the tool with suiicient power to hold it securely.

What I claim as my invention, and desire to secure by Letters Patent,is-

The hinged gripe E, in combination with the spring e and socket A,constructed,l arranged, and operating substantially as and for thepurposes' herein specified?MM In testimony that I claim the above, Ilhave hereunto subscribed my name, in the presence of two witnesses.

WILLIAM H. SIBLE.

Witnesses:

Roer. SNoDGnAss, J. F. CLARK.v

